OXIDATION and REDUCTION Notes
... Ions can be oxidised and reduced to form other ions, so aqueous ion / aqueous ion half-cells exist. Ions, like gases cannot form conducting electrodes, so an inert electrode is used in these half-cells. The half-cell for the oxidised for of an aqueous ion (M2+(aq)) and the reduced form of the aqueou ...
... Ions can be oxidised and reduced to form other ions, so aqueous ion / aqueous ion half-cells exist. Ions, like gases cannot form conducting electrodes, so an inert electrode is used in these half-cells. The half-cell for the oxidised for of an aqueous ion (M2+(aq)) and the reduced form of the aqueou ...
Chapter 23 - Organic Chemistry
... Polar functional groups in these polymers produce strong intermolecular forces that add significant tensile strength to the material. ...
... Polar functional groups in these polymers produce strong intermolecular forces that add significant tensile strength to the material. ...
lecture 11 catalysis_hydrogenation of alkenes
... oxidative addition of H2 to the 3‐coordinate d8 RhCl(PPh3)2 to give 5‐coordinate d6 RhH2Cl(PPh3)2 relative to the corresponding 4‐coordinate→6‐coordinate conversion is consistent with the tendency for faster reductive elimination from 5‐coordinate d6 species ...
... oxidative addition of H2 to the 3‐coordinate d8 RhCl(PPh3)2 to give 5‐coordinate d6 RhH2Cl(PPh3)2 relative to the corresponding 4‐coordinate→6‐coordinate conversion is consistent with the tendency for faster reductive elimination from 5‐coordinate d6 species ...
10. Alkyl Halides - faculty at Chemeketa
... The selectivity of chlorine radical is 1.0 : 3.5 : 5.0 for 1°, 2° and 3° hydrogens, respectively. Assuming that only monochlorides are produced in the radical chain chlorination of 2,3-dimethybutane, what would be the expected ratio of the two isomeric alkyl chlorides formed in the reaction? ...
... The selectivity of chlorine radical is 1.0 : 3.5 : 5.0 for 1°, 2° and 3° hydrogens, respectively. Assuming that only monochlorides are produced in the radical chain chlorination of 2,3-dimethybutane, what would be the expected ratio of the two isomeric alkyl chlorides formed in the reaction? ...
In-Plane Effective Thermal Conductivity of Plain
... Keywords: thermal conductivity, plain-weave, porosity, screen-laminates. ABSTRACT: A simple -to-fabricate woven mesh, consisting of bonded laminates of twodimensional plain-weave conductive screens is described. Geometric equations show that these porous matrices can be fabricated to have a wide ran ...
... Keywords: thermal conductivity, plain-weave, porosity, screen-laminates. ABSTRACT: A simple -to-fabricate woven mesh, consisting of bonded laminates of twodimensional plain-weave conductive screens is described. Geometric equations show that these porous matrices can be fabricated to have a wide ran ...
cyclic voltammetry - Clayton State University
... tip is moved close to the substrate surface immersed in a solution containing an electroactive species - The tip currents are a function of the conductivity and chemical nature of the substrate as well as the tip-substrate distance Images obtained give information on - electrochemical activity - che ...
... tip is moved close to the substrate surface immersed in a solution containing an electroactive species - The tip currents are a function of the conductivity and chemical nature of the substrate as well as the tip-substrate distance Images obtained give information on - electrochemical activity - che ...
EMI_PG 1 - Boyd Corporation
... performance degradation due to unintentional EMI. Electronic devices should be able to operate in a shared environment without interfering with one another’s stable performance. This is not an easy measurement because there Figure 7: Ferrite core on cable are a lot of potential EMI “noise” factors i ...
... performance degradation due to unintentional EMI. Electronic devices should be able to operate in a shared environment without interfering with one another’s stable performance. This is not an easy measurement because there Figure 7: Ferrite core on cable are a lot of potential EMI “noise” factors i ...
enantioselective zeolite-catalyzed reactions
... major topic of discussion and research.1 Homogeneous, asymmetry-inducing catalysts have been developed for a wide range of reactions, especially notable are those developed by Knowles, Noyori and Sharpless, for which they jointly received the 2001 Nobel Prize in Chemistry.2 Although these reactions ...
... major topic of discussion and research.1 Homogeneous, asymmetry-inducing catalysts have been developed for a wide range of reactions, especially notable are those developed by Knowles, Noyori and Sharpless, for which they jointly received the 2001 Nobel Prize in Chemistry.2 Although these reactions ...
Catalytic hydrogenation
... A bidentate, C2 symmetric version of the cationic Schrock-Osborn catalyst affords high levels of enantioselectivity in the hydrogenation of achiral enamides. This was the first demonstration that a chiral metal complex could effectively transfer chirality to a non-chiral DIPAMP - chiral (C2) substra ...
... A bidentate, C2 symmetric version of the cationic Schrock-Osborn catalyst affords high levels of enantioselectivity in the hydrogenation of achiral enamides. This was the first demonstration that a chiral metal complex could effectively transfer chirality to a non-chiral DIPAMP - chiral (C2) substra ...
Potentiostat Basics
... We would like to study the electrochemical events taking place at one specific electrode…the Working Electrode. The use of a three-electrode potentiostat with a separate Reference and Counter Electrode allows the potential at the WE and the current at the WE to be measured with little or no “interfe ...
... We would like to study the electrochemical events taking place at one specific electrode…the Working Electrode. The use of a three-electrode potentiostat with a separate Reference and Counter Electrode allows the potential at the WE and the current at the WE to be measured with little or no “interfe ...
Surface activation of plastics by plasma for adhesion promotion
... The electromagnetic radiation created in This effect can intentionally be used to the plasma is also strong enough to crack increase for example the shore hardness bonds in the polymer. Some atoms are at the surface of elastomers. excited in the plasma. They emit radiation in the range of infrared t ...
... The electromagnetic radiation created in This effect can intentionally be used to the plasma is also strong enough to crack increase for example the shore hardness bonds in the polymer. Some atoms are at the surface of elastomers. excited in the plasma. They emit radiation in the range of infrared t ...
CH 1 and 2 Test Answer Section
... ____ 14. These values were recorded as the mass of products when a chemical reaction was carried out three separate times: 8.83 g; 8.84 g; 8.82 g. The mass of products from that reaction is 8.60 g. The values are a. accurate, but not precise. b. precise, but not accurate. c. both accurate and precis ...
... ____ 14. These values were recorded as the mass of products when a chemical reaction was carried out three separate times: 8.83 g; 8.84 g; 8.82 g. The mass of products from that reaction is 8.60 g. The values are a. accurate, but not precise. b. precise, but not accurate. c. both accurate and precis ...
Substituted Hydrocarbons and Their Reactions
... CFCs have been replaced by HFCs (hydrofluorocarbons), which contain only hydrogen and fluorine atoms bonded to carbon. One of the more common HFCs is 1,1,2-trifluoroethane, also called R134a. Naming halocarbons Organic molecules containing functional groups are given IUPAC names based on their main- ...
... CFCs have been replaced by HFCs (hydrofluorocarbons), which contain only hydrogen and fluorine atoms bonded to carbon. One of the more common HFCs is 1,1,2-trifluoroethane, also called R134a. Naming halocarbons Organic molecules containing functional groups are given IUPAC names based on their main- ...
Transesterification of Animal Fat to Biodiesel Over Calcined
... its abundance, cost effectiveness and better physic chemical properties [7]. In addition, the type of catalyst that can be used for transesterification can be either acidic or basic or rather in the category of homogeneous or heterogeneous. Homogenous catalysts such as sodium hydroxide (NaOH) and po ...
... its abundance, cost effectiveness and better physic chemical properties [7]. In addition, the type of catalyst that can be used for transesterification can be either acidic or basic or rather in the category of homogeneous or heterogeneous. Homogenous catalysts such as sodium hydroxide (NaOH) and po ...
+ R - Purdue Physics
... Ohmic materials: materials in which conductivity is independent of the amount of current flowing through V I R R ...
... Ohmic materials: materials in which conductivity is independent of the amount of current flowing through V I R R ...
Give reasons for the following.(one mark each)
... 3. Aryl fluorides are not prepared by the electrophilic substitution of arenes. 4. Reaction of toluene with iodine requires an oxidizing agent. 5. Sulphuric acid is not used for the reaction of alcohol with KI. 6. Boiling point of alkyl halides are higher than that of corresponding hydrocarbons. 7. ...
... 3. Aryl fluorides are not prepared by the electrophilic substitution of arenes. 4. Reaction of toluene with iodine requires an oxidizing agent. 5. Sulphuric acid is not used for the reaction of alcohol with KI. 6. Boiling point of alkyl halides are higher than that of corresponding hydrocarbons. 7. ...
S. Lee, J. Ha, S. Jo, J. Choi, T. Song, W.I. Park, J.A. Rogers and Ungyu
... also measured using a UTM. PVA was used as a polymer layer because it is a water-soluble, non-toxic synthetic polymer with an excellent film-forming ability and excellent mechanical properties.21 In this study, the mechanical properties of PVA were controlled by using phosphoric acid as a plasticize ...
... also measured using a UTM. PVA was used as a polymer layer because it is a water-soluble, non-toxic synthetic polymer with an excellent film-forming ability and excellent mechanical properties.21 In this study, the mechanical properties of PVA were controlled by using phosphoric acid as a plasticize ...
Basic Concepts in Electrochemistry
... The fractions of current carried by the positive and negative ions are given by their transport numbers t+ + t- respectively Each mole of current passed corresponds to 1 mole of electrochemical change at each electrode. Therefore the amount of ions transported in the electrolyte also equals 1 mol. T ...
... The fractions of current carried by the positive and negative ions are given by their transport numbers t+ + t- respectively Each mole of current passed corresponds to 1 mole of electrochemical change at each electrode. Therefore the amount of ions transported in the electrolyte also equals 1 mol. T ...
Corrosion: Part 3 – Measurement of Polarization Resistance (COR03)
... corrosion rates was outlined. The calculations were valid under the assumption that the corrosion reactions were under charge transfer control and that the mechanisms of the reactions were known. In real life, often, corrosion is a result of several reactions and it is not possible to a priori deter ...
... corrosion rates was outlined. The calculations were valid under the assumption that the corrosion reactions were under charge transfer control and that the mechanisms of the reactions were known. In real life, often, corrosion is a result of several reactions and it is not possible to a priori deter ...
Palladium Nanoparticles Entrapped in Aluminum Hydroxide: Dual
... performed under various conditions for comparison with the commercially available catalysts (Pd/C and Pd/Al2O3) and the recently reported heterogeneous catalysts. The aerobic oxidation of 1-phenylethanol proceeded smoothly with only 0.20 mol % Pd in conventional organic solvents. It also worked in w ...
... performed under various conditions for comparison with the commercially available catalysts (Pd/C and Pd/Al2O3) and the recently reported heterogeneous catalysts. The aerobic oxidation of 1-phenylethanol proceeded smoothly with only 0.20 mol % Pd in conventional organic solvents. It also worked in w ...
Preparation of d, l-Phenylalanine by Amidocarbonylation of Benzyl
... large scale production. The process as described in the patent has several drawbacks that need to be overcome before scale-up can be attempted. Very high pressures, i.e. between 250 and 300 bar, are needed for good yields of acylated amino acid. Relatively large amounts of the catalyst, Co2(CO)8, ar ...
... large scale production. The process as described in the patent has several drawbacks that need to be overcome before scale-up can be attempted. Very high pressures, i.e. between 250 and 300 bar, are needed for good yields of acylated amino acid. Relatively large amounts of the catalyst, Co2(CO)8, ar ...
Magnetism Sampler random from text - Rye High School
... D) either no magnetic field exists or the particle is moving parallel to the field. E) either no magnetic field exists or the particle is moving perpendicular to the field. ____ ...
... D) either no magnetic field exists or the particle is moving parallel to the field. E) either no magnetic field exists or the particle is moving perpendicular to the field. ____ ...
Iron(II) Chloride–1,1′-Binaphthyl-2,2′-diamine
... reaction, none of them provided better yields than iron(II) chloride. It was found that when a higher oxidation state iron catalyst (Fe3+) was used, no product formation was observed. The best result was obtained with iron(II) chloride (5 mol%), which gave bisindolylmethane 2 in 75% yield after six ...
... reaction, none of them provided better yields than iron(II) chloride. It was found that when a higher oxidation state iron catalyst (Fe3+) was used, no product formation was observed. The best result was obtained with iron(II) chloride (5 mol%), which gave bisindolylmethane 2 in 75% yield after six ...
Application Data: Theory and Application of Conductivity
... Most conductivity standards are solutions of potassium chloride, so even if temperature and conductivity data are not on the label, the data are readily available in reference books. Conductivity standards are susceptible to contamination from atmospheric carbon dioxide. Carbon dioxide dissolves in ...
... Most conductivity standards are solutions of potassium chloride, so even if temperature and conductivity data are not on the label, the data are readily available in reference books. Conductivity standards are susceptible to contamination from atmospheric carbon dioxide. Carbon dioxide dissolves in ...
Polythiophene
Polythiophenes (PTs) are polymerized thiophenes, a sulfur heterocycle. They can become conducting when electrons are added or removed from the conjugated π-orbitals via doping. The study of polythiophenes has intensified over the last three decades. The maturation of the field of conducting polymers was confirmed by the awarding of the 2000 Nobel Prize in Chemistry to Alan J. Heeger, Alan MacDiarmid, and Hideki Shirakawa ""for the discovery and development of conductive polymers"". The most notable property of these materials, electrical conductivity, results from the delocalization of electrons along the polymer backbone – hence the term ""synthetic metals"". However, conductivity is not the only interesting property resulting from electron delocalization. The optical properties of these materials respond to environmental stimuli, with dramatic color shifts in response to changes in solvent, temperature, applied potential, and binding to other molecules. Both color changes and conductivity changes are induced by the same mechanism—twisting of the polymer backbone, disrupting conjugation—making conjugated polymers attractive as sensors that can provide a range of optical and electronic responses.A number of comprehensive reviews have been published on PTs, the earliest dating from 1981. Schopf and Koßmehl published a comprehensive review of the literature published between 1990 and 1994. Roncali surveyed electrochemical synthesis in 1992, and the electronic properties of substituted PTs in 1997. McCullough's 1998 review focussed on chemical synthesis of conducting PTs. A general review of conjugated polymers from the 1990s was conducted by Reddinger and Reynolds in 1999. Finally, Swager et al. examined conjugated-polymer-based chemical sensors in 2000. These reviews are an excellent guide to the highlights of the primary PT literature from the last two decades.